--语法:select * from 表名 *表示查询所有字段数据 select * from Class select * from Student select * from RankingList --常量列 select 1,2,3 --计算列 select '班级:'+Name from Read More
posted @ 2020-08-03 23:56 CR7Ronaldo Views(554) Comments(0) Diggs(0) Edit